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Grade 5
Topic Cloze Quiz
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Surviving in Ecosystems
Different kinds of organisms interact with each other in a number of different ways. In nature a relationship between two kinds of organisms that lasts over a period of time is called
pollinates
symbiosis
mutualism
commensalism
Select your answer
. When a relationship between two kinds of organisms benefits both of them, it is called
mutualism
commensalism
symbiosis
harm
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. For example, the yucca moth
commensalism
pollinates
harm
sea anemones
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the yucca flower, and the yucca flower provides a place for yucca moth
gleas
eggs
hosts
sea anemones
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to develop. A relationship in which one kind of organism lives on or in another organism and may
hosts
commensalism
harm
pollinates
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that organism is called parasitism. The organisms parasites feed on are called
hosts
eggs
gleas
commensalism
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. A parasite of dogs and cats is
sea anemones
symbiosis
fleas
commensalism
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. A relationship where one organism benefits from another without helping or harming it is called
hosts
mutualism
commensalism
harm
Select your answer
. Certain tropical fish live unharmed among the poisonous tentacles of
sea anemones
gleas
eggs
harm
Select your answer
, which provide safety for the fish.